Method of making heat-resistant cementitious material



A. TROPIANO METHOD OF MAKING HEAT-RESISTANT CEMENTITIOUS MATERIAL Nov. 5, 1946.

Filed July 19, 1944 v S u w v R M M M W w A M m P L R s, s L M M M M M .m L E R a R E M A F r s F T P N o A p a A m 6 M M 6 M m a M 5 m E N s N w a O L P W W I E L A A T I E A P A E A w u H N a m N m a a. 0 9 a s 1 firwmwbrrawmwmwmwwww JVVVVVVVVVVVVVVVQV\\\\\\\\\\\ M ATTORNEY one s Anthony Tropiano, East l ortchester, (loan. Applicationduly. N, 1944, Serial No. 545,724

1 Claim. (ores-+5154) The invention relates to cementitious materials and has for its object to provide a cementitious material capable of s wide variety of uses, which is heat resistant to a very high degree.

' The invention contemplates further the provision oi a cementitiousmaterial which will resist the action of a blow torch or an acetylene torch applied thereto, and which apparently inores in hardness under the application of such heat. Another object of the invention is to provide novel cementitious material.

A further purpose of the invention is to provide a novel method of making the novel cement'itious material.

The accompanying drawing which, in exaggerated form, illustrates an example of the invention without defining its limits, shows, in sectional view, a coating embodying the novel cementitious material. I

The novel .cementitious material, may be of various types, all oi which include the property 1:: a of being heat-resistant to a. very high degree.

been found satisfactory and may be used in the mixture.

Asatisfactory result has been attained with a mixture consisting of one pound of Portland or Brixment cement, from one up to eleven pounds of gypsum plaster mown to the workmen as "nest," and water enough to enable the mixture to'be worked into a te.

The resulting paste may be molded or otherwise shaped to predeteed form and in any case may be baked in the presence of heat preferably at atemperature oi at least twenty-three hundred and fifty degrees (2350 F.) Fahrenheit,

erably is first permitted to set and then is made wet, for instance, by holding it in water from a faucet, and then baked for instance byhe 4 put in an oven. The material is removed from the oven after a predetermined time-interval, for

instance, of fifteen minutes and again made wet and replaced in the oven. This operation is re posted at fliteemminute intervals untfl said ma= terial has been subjected to the aforesaid treat- As the t step tar pamr or other ment for three quarters i an hour. That is, said I I material is removed from the oven, made wet again, and placed in the oven three times in three-quarters of an hourand then permitted to cool.

At this stage the cementitious material is heatresistant to a very high degree, and is capable of resisting, without injury, the heat of'a blow torch, or an acetylene torch, applied thereto. .As

m a matter of fact, such application of heat appears novel coatings of various types embodying the to increase the hardness of the material.

- In some cases paper in relatively small pieces.

may be added to the aforesaid mixture of Portland or Brixment cement and 2 plaster '15 (met) in comparatively small amounts. For in- Other objects will appear from the description hereinafter and the features of novelty will be p inted out in the cl stance, the amount of paper added may comprise aproximately several full tablespoons.

The novel material has been also produced in e'ihcient form with a mixture of roolswool, Portland or Brixment cement and gypsum plaster (neet). combined with each other in predetermined proportions, and mixed together in water enough to produce the desired consistency.-

. -For instance, the mixture may comprise one pound of rockwoohone pound of Portland or Brixment cement, one pound oi gypsum plaster (meet) and enough water .to bring'the mixture to the desired consistency."

Thismixture may then be permitted to set and Y I :1; heat-treated in the same way as previously described herein.

Inits finished form the material is extremely hard and is capable of to a very high polish The novel cementitious material may be used for many purposes such as building blocks, pottery, bathtubs and other tubs, shower stalls,

. swimming pools and tile. The material further may be used for making molds of different types, pipes, grind stones and ovens, and in addition so may be utilized insulation, as flooring, and ior counters, bars and the like.

es plaster of Paris, cast iron and other metals, sheet until hardened. In such case the mixture prefrock, etc., and as plaster on rock, lath. cement blocks, bricks, @elotex and. newspaper. The novel cementitious material may be utilized ior many other purposes and is of mammum so emciency as stucco for houses d the like, and

in the construction of walls, partitions and the like.

. In suchcase the following ceeding is preierred:

paper 5, in the form of sheets, is nailed on the support 6, which may be the fram of a building, a wall or other structure. The nails "I, whereby the sheets are nailed in place, preferably include heads 8 and are driven only part way into the support 6 as illustrated in the drawing, so

tion at an appropriatestage to imbed the heads lithereof in theouter coating Ill-a as shown in the drawing.

as to project outwardly beyond the building paper l5. Sheets 9 of newspaper or its equivalent are then secured in place, in surface engagement,

with the tar or other building paper 5, in any convenient manner as by means of a suitable paste, shellac or the like.- As the next step, a

coating III of the novel cementitious material in plastic form is applied to the newspaper sheets 9 to cover the same to a predetermined thickness; for instance, said coating Ill may be about 54;" in thickness. Additional sheets 9-a of newspaper, orthe like, are then applied to the coating It in surface engagement therewith to cover the same while said coating ill is still plastic. An additional coating l0-a of the novel cementitious material is then spread upon the surface of the additional sheets 9a. This second and outer-coating ill-a preferably is also of approximately A in thickness. The coatings I9 and l0--a are trowelled down under fairly good presplaster, and water together in predetermined proportions to form a paste, shaping said paste of at least twenty-three hundred and fifty desure and the outer-coating I0-a is covered with paper in the form of sheets H which remain in place until the material It and Ill-a has set and dried and then may beremoved. Th sheets ll serve to rotect the outer-coating llla while the latter is dryingzandsubsequent thereto are removed in any convenient manner. The protective sheets I I may be applied to the coating iii-a by trowelling and in addition to the protective into predetermined form and permitting it to set, surface-wetting said set material, subjecting said surface wet material to the action of oven heat grees Fahrenheit for a time-period of fifteen minutes, removing said material from thesetion of said heat at the end of said time-period, rewetting said material, subjecting said rewet material to the action of oven heat at the same temperatur for asecond time-period of fifteen minutes, removing said material from the action function may serve to produce a surface design on the outer face of the coating ill-a. If necessary, the nails I may be driven into proper posicool.

of said heat at the end of said second time-period, again wetting said material, subjecting said again-wet material to the action of oven heat at the same temperature for a third time-period of fifteen'minutes, removing said material from the action of said heat at the end of said third time-period, and permitting said material to ANTHONY TROPIANO. 

